Medina, P. J. (2000). Road users tax. Philippine Daily Inquirer.
Chicago Style aipamenaMedina, Pol Jr. "Road Users Tax." Philippine Daily Inquirer 2000.
MLA aipamenaMedina, Pol Jr. "Road Users Tax." Philippine Daily Inquirer, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.